<template>

  <el-container class="home-container">
    <!--头部-->
    <el-header>
      <div>
        <img src="" alt="">
        <span>管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--主体-->
    <el-container>
      <!--侧边-->
      <el-aside :width="isCollapse ? '64px' : '200px'"><!--三目运算符判断是否折叠-->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" :unique-opened="true"
          :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
          <!--背景——文字——高亮——是否只能点开单个菜单——是否折叠框体——隐藏收起动画——开启路由模式-->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children" :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"><!--index下path因为不带‘/’所以需要手动添加 v-for使其循环-->
              <i class="el-icon-menu"></i>
              {{ subItem.authName }}
            </el-menu-item>
          </el-submenu>

        </el-menu>
      </el-aside>
      <!--右侧主体-->
      <el-main>
        <!--路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        '125': 'el-icon-s-custom',
        '103': 'el-icon-s-cooperation',
        '101': 'el-icon-s-goods',
        '102': 'el-icon-s-order',
        '145': 'el-icon-s-marketing'
      },
      isCollapse: false,
      activePath: ''
    }



  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },

  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取菜单数据
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
    },
    // 点击折叠左侧
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    },
  }

}
</script>

<style lang="less" scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;

  >div {
    display: flex;
    align-items: center;

    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;

  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.home-container {
  height: 100%;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  color: #fff;
  line-height: 24px;
  font-size: 10px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>